Molding apparatus



Feb. '12, 1929.

. H. H. c. GRONDAHL MOLDING APPARATUS Filed Sept. 5, 1926 2 Sheets-Sheet 2 54 6 0/26 flaw/mm J/41 W- my Patented Feb. 12, 1929.

UNITED STATES.

HANS HENRIK CHRISTIAN GRONDAI'IL, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO 'WEST-' PATENT OFFICE.

ERN ELECTRIC COMPANY, INCORPGRATED, OF NEW YORK, N. Y., A CORPORATION on NEW YORK.

MOLDING APPARATUS.

Application filed September 3, 1926. Serial No. 133,314.

This invention relates to molding apparatus, and more particularly to a multi-mold' metal, casting apparatus.

The object of the invention is to provide a molding apparatus wherein a plurality of articles may be molded in a single opera tion and in which the several parts of the apparatus may be readily secured together or separated with a minimum expenditure 1 of time and effort.

In accordance with the general features of the invention, in one embodiment thereof there is provided a back plate which forms a mold section to which is loosely hinged a plurality of other plates in such a manner that when swung into operative position they coact with the back plate and with each other to form a plurality of molds. The back plate also carries a series of locking members which may engage corresponding projections carried by the outer or front plate to securely fasten the several parts in operative position and which may be quickly with drawn to permit the removal of molded articles.

It is believed that the invention will be clearly understood from the following detailed description taken in connection with the accompanying drawings, in which Fig. 1 is a side elevation of a molding apparatus embodying the invention;

Fig. 2 is a front elevation thereof;

Fig. 3 is a plan view thereof;

Fig. 4 is. an enlarged detail view of a locking means forming a part thereof;

Fig. 5 is a front elevation of another embodiment of the invention;

Fig. 6 is a side elevation thereof, and

Fig. 7 is a plan view thereof.

In the drawings in which like numerals designate similar parts throughout the several views, Figs. 1 to 4, inclusive, illustrate an embodiment of the invention by means of i which two slabs of material may be molded at a single pouring. In this embodiment there is provided a channel shaped back plate 10 provided at each side with a plurality of rearwardly extending lugs 11-11 upon which locking members 12-12 are mounted by means of shafts 18-13 extending through apertures in the lugs and locking members and held in place in any suitable manner such as by means of spacing collars 14-44 and securing collars 15-15. The back plate 10 is provided at the right hand side, as viewed in Fig. 2, with a phi-- rality of laterally and forwardly extending a1iiertured lugs 16-16 in which pins 17-17 are driven and upon which is. pivotally mounted a plate 18 by means of apertured lugs 19-19 formed thereon, designed to cooperate with the lugs 16-16 and with the pins 17-17 to form hinges upon which the plate 18 may be rotated into contact with the back plate 10, in the position shown in full lines in Fig. 3, in which position it cooperates with the back plate 10 to forma mold chamber. The back plate 10 is also provided upon the left hand side, as Viewed in Fig. 2, with laterally and forwardly extending apertured lugs 21-21 in which pins 24-24 are driven and upon which is pivotally mounted a channel shaped plate 22;

by means of apertured lugs 23-23 and the pins 24-24 in a manner similar to that in which the plate '18 is mounted. The plate 22 may be swung into the position shown in full lines in Fig. 3 against the plate 18 to cooperate with the latter in forming a mold chamber similar to that formed by the plates 10 and 18. The apertures in the lugs 19-19 and 23-23 are slightly larger than their corresponding pins 17-17and 2424 to furnish sufficient clearance to permit the plates 18 and 22 to be securely locked into operative position by the locking members 12-12.

Upon the front of the plate 22 are attached. a plurality of U-shaped members 25-25 provided at each side with laterally extending pins 26-26idesigned to be engaged by the locking members 12-12 pivotally mounted on the back plate 10 when the plates 18 and 22 are in their closed position, as seen in full lines in Fig. 3. The locking members 12-12 comprise L-shaped arms 28-28 which are pivotally attached at their straight ends to the lugs 11-11, as heretofore described, and latching levers ,29-29 pivotally attached to the extremities of the oifset ends of the L-shaped arms 28-28. The locking levers 29-29 conslst of U-shaped members which are so pos1- tioned that the legs of the U are disposed on each side of the L-shaped arms 28-28, and pins 30-30 are inserted through apertures in the arms 28-28 and the latching levers 29-29-t0 securethe latter elements to the arms. The inner surfacesor the latching levers are provided with shoulders 32 32 designed to engage the ends ofthe arms .2828 toprevent the solid ends 31- 31 thereof from causing the latching levers 29-29 to rotate about the pins 303O beyond the positionshown in Fig.4 and as sume a vertical position. Inclinedsurfaces 33-33 are also provided on the inner sides of the latching levers 2929 which are designed to engage the upper sides of the offset ends of the L-shaped arms 2828 when the arms areraised in the position shown by thelower latches in Figs. 1 and 2; Arcuate' notches 35-35 are provided in the ends of the arms "of the locking levers 29-29 and y the fork-shaped ends 36-136 formed thereby are designed to engage the pins 2626 to secure the several members inoperative pov sitions.

The'operation of this embodiment of the invention is as follows: The intermediate plate'18 is swung into contact with theback plate 10 in the position shown in full lines in Fig. 3, the outer plate 22 is then swung into contactwith'theintermediate plate 18 and thelocking members 12-412 are swung downwardly from the position shown by the lower latches in Figs. 1 and 2 until the forkshaped ends 36 36 of the latching levers 29-.29 come into contact with the pins pins 26.26'are tightly clamped between the.

s to release the pins 26 26 and the locking- 26- 26. The latching levers 2929 are rotated. about the pins 30-30 by means of suitabletoolsslippe'd over the'ends 81- 31 ofthe latching levers into locking position, as shown in Fig. 4, 111 which. position the fork-shaped ends '36-36 of the latching levers;2929 and the L-shaped arms 28 -28 and the several plates aresecurely locked in operative position.

7 I Molten material may then be poured into the mold chambers formed by the coaction ofithe plates 10, 18 and 22 and allowed to remain until it is solidified. The latching levers 29-29 may then be easily and quickly rotated upwardly members ,12-12 raised when the plates 22 and 18 may be swung into open position as shown in dotted lines in Fig. 3 in order that,

the slabs of solidified material formed there inmay be removed.

In the embodiment illustrated in Figs. '5,

'6 and 7 there is provided a back plate 50 upon the front of which are formed a plurality of longitudinal ribs 51-51, thereby forming .mold sections. An intermediate plate 52 is pivotally attached to'the back. plate 50 in a manner similar to that described. for the intermediate plate in the first form, and upon the frontface thereof there "is provided a plurality of longitudinal ribs 53-53 similar to those upon the back plate 50. An outer or front plate 54 is also pivotally secured to the back plate 50 in a manner similar to that described for the outer platein the first form and is provided upon the front face with aplurality of forwardly extending beads 5555. which are'designed to beengaged by a corresponding series of horizontally swinging latches 5G-56 which are pivotally mounted upon' the back plate 50. A rearwardly extending lug 57 is provided upon the'back plate 50 and a forwardly extending lug 58 is provided upon the front plate 54 to provide means which may be engaged by a crane hook in order to move the mold to any desired locatiomwhile another lug 59 is also provided 'uponthe back plate 50 to support the mold upon a mold turret or other support.

The operation of this embodiment of the invention is 'as follows: The intermediate plate 52 is swung into contact with the back plate 50 in the position shown in full'lines from the beads 5555 and the plates 54 and 52 swung into open position as shown in i dotted lines in Fig. 7 forthe purpose of re- 7 moving. the, slabs of solidified "material formed therein. f

By loosely hinging the intermediate and front plates tothe back plates in'the above embodiments of the invention. it is possible to effect atight'fit between the several plates when the locking'members or latches are forced into locking position because the plates are free to be moved toward the back plate by the locking members a distance sufiicient to contact with the adjacent plates along each edge.

The above described embodiments ofithe invention are particularly. adapted for 'molding' slabs of non-ferrous. metals'which are to be subsequently formed into various shapes, but it is to be understood that they are illustrative only and that various changes in thefsize and arrangement .of

parts may be made withoutdeparting from the scope of the invention as defined by the annexed claims. What 1s claimed 1s:

rear plate and mold elements pivoted thereto in a" vertical axis and designed to be placed in juxtaposition to form mold cham- 1. A molding apparatus comprising 'a '1 hers and to be separated to permit removal of articles molded therein.

2. A molding apparatus comprising a back plate and elements pivoted to the edges thereoftin a vertical axis so that one of the elements may be swung into cont-act with the'l'iack plate and another element may be similarly swung into contact with the first mentioned element to form mold chambers for receiving molten material.

3. In a molding apparatus, a stationary back plate forming a mold section, an intermediate plate hinged to one side of the back plate, and an outer plate hinged to the other side of the back plate, the intermediate and outer plates designed to cooperate with the back plate and with each other to form mold chambers for receiving molten material.

4. In a molding apparatus, a stationary channel shaped back plate, an intermediate plate hinged to one edge of the back plate, an outer channel shaped plate hinged to the other edge of the back plate, the intermediate plate designed to cooperate with the back plate and the outer plate designed to cooperate with the intermediate plate to form mold chambers for receiving molten material, and locking members pivotally mounted on the back plate for securing the several plates in operative position.

5. In a molding apparatus, a back plate, a locking member pivotally mounted thereon and comprising arms to which are pivotally attached latching levers provided with arcuate slots, a forward section, and pins carried thereby engageable with the latching levers to secure the back plate and for cooperate with the intermediate plate tov form mold chambers for receiving molten material, laterally ext-ending pins carried by the outer plate, and locking members pivotally mounted on the back plate comprising Lshaped arms to which are pivot-V ally attached U-shaped latching levers provided with arcuate slots designed to engage the pins to secure the several elements in operative position. I

7. A molding apparatus comprising a back plate, a forward section pivot-ally mounted on one edge of the back plate in a vertical axis, and an intermediate plate pivotally mounted on the otheredge of the back plate in a vertical axis;

8. In a moldin apparatus, a back plate, a forward section pivotally mounted thereto in a vertical axis, a pin mounted on the forward section, an intermediate section pivotally mounted to the back plate in a vertical axis, and a locking member mounted on the back plate to engage the pm.

In witness whereof, I hereunto subscribe my name this 13th day of August, A. D.

HANS HENRIK CHRISTIAN GRONDAHL. 

